Khan Academy links

Khan Academy educational video on subtracting mixed numbers word problem.
Khan Academyeducational video on adding mixed number word problem
Khan Academy educational video on dividing mixed number word problem
Khan Academy educational video on multiplying fractions and mixed numbers
Khan Academy practicing percentage word problems 2
Khan Academy practicing composite numbers exercises
Khan Academy practicing percentage word problems1
Khan Academy representing a number as a decimal, percent, and fraction 2
Khan Academy subtracting decimal numbers
Khan Academy subtracting decimals word problem
Khan Academy Prime numbers video
http://www.khanacademy.org/math/algebra/ck12-algebra-1/v/box-and-whisker-plot box and wisker plots
http://www.khanacademy.org/math/brain-teasers/v/alien-abduction-brain-teaser brain teaser